Pressure-relieving trunnion-bearing for guns.



0. KNOCH.

PRESSURE RELIEVING TRUNNION BEARING FOR GUNS.

' APPLICATION FILED SEPT. 11. ms.

1,190,299. Patented Ju1y11,1916.

a mi an eras rare Enron.

OSCAR KNOCH, OF ESSEN-ON-THE-RUHR, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIENGESELLSCHAFT, OF ESSEN-ON-TI-IE-RUHR, GERMANY.

PRESSURE-RELIEVING- TRUNNION-BEARING FOR GUNS.

Application filed September 11, 1913.

To all whom it may concern.-

Be it known that 1, Oscar KNooH, resid ing at Essen-on-the-Ruhr, Germany, a subject of the Emperor of Germany, have invented a certain new and useful Improvement in Pressure-Relieving Trunnion-Bearings for Guns, of which the following is a specification.-

The present invention relates to pressure relieving bearings for guns and consists in improvements in trunnion bearings of this kind for preventing lateral displacement, during firing of the gun, out of its firing direction.

One embodiment of the invention is illus trated in the accompanying drawing and Figure 1 shows an elevation of the left hand trunnion bearing and Fig. 2 a cross section of Fig. 1 along line 2-2 of the left hand bearing, and along 2 2 of the right hand trunnion bearing, the cradle and the gun being represented in rear elevation.

The gun A is slidably mounted in the cradle B, which latter is mounted by means of the main trunnions C in the body of the carriage D. The bodies D of the bearings are open on the side toward the breech of the gun, and closed by caps (Z the perpendicular inner wall (1) of the cap (Z and the opposite wall (Z of the bearing body D constituting guiding surfaces for a sleeve E, in which the main trunnion C is mounted without play. The sliding surfaces (Z (Z abut without play against the sliding surface 6 and e of the sleeve E, while the sleeve E may be slightly displaced in a vertical direction in the bearing D (Z Each of the main trunnions C is provided with a smaller trunnion c situated outside I the sleeve E, and the axis of which coincides.

with the axis of the main trunnion. The auxiliary trunnions 0 each rest on a sled Gr and are supported by rollers H traveling on a rail J. The rail J may be adjusted in a vertical direction by means of two set screws K threaded in a projection (Z on the bearing body D The screwing in of the screws K causes Specification of Letters Patent.

Patented July 11, 1916.

Serial No. 789,320.

a raising of the auxiliary trunnions 0 and as a consequence also of the cradle and of the gun barrel. The trunnion sleeves E will then be lifted from their bottom bearings to relieve them from the weight of the gun barrel and the cradle. As the main trunnions C are mounted without play in the:

sleeves E and the sleeves in their turn are guided without play in the bearing body D between the guiding surfaces (Z and d which run in the direction of the bearingrelieving movement, the gun barrel during firing will be effectually prevented from turning sidewise out of firing direction. The gun retains therefore, during firing, its position relative to the sight line so that an error in the side direction will be prevented.

I claim:

1. Pressure relieving trunnion bearings for guns provided with trunnions comprising a sleeve without play on each trunnion, a bearing body for said sleeve, said sleeve being guided without play in the bearing body between guiding surfaces which run in the direction of the bearing-relieving movement and an auxiliary trunnion on each of the main trunnions and in alinement therewith, said auxiliary trunnion having a vertically adjustable seat on the bearing body.

2. Pressure relieving trunnion bearings for guns provided with trunnions, comprising a sleeve without play on each trunnion, said sleeve having straight outside surfaces, a bearing body open on one side and a cap for closin said opening, said bearing body and cap fitting closely in all directions around the sleeve only permitting vertical displacement of the sleeve; an auxiliary trunnion on each of the main trunnions and in alinement therewith, a sled mounted on a pair of rollers supporting each auxiliary trunnion, a rail for carrying the rollers, set screws under the rail, said screws being vertically adjustable in a ledge on the bearing body; whereby said sleeves will be relieved from the weight of the gun on raising said sleds, rollers and rails by means of said screws, and transverse turning of the gun men, Germany, this 21st day of August,

out of its given firing direction will be pre- 1913. vented said rollers being provided with 7 guide ilanges engaging both With said rail OSCAR KNOCH' and said sled, whereby the sled is guided by In presence of the rollers and the rollers by the rail. ALBERT NUFER,

The foregoing specification signed at Bar- JULIUs FESTNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

